AHAHAHAHA HAHAHAHAHA HAHAHAHA AHAHAHAHA AHAHAHAHA HAHA HA HA HA はっはっは！（笑）ｗｗｗｗｗｗｗｗｗｗｗｗ へっへっへっへっへふふふふふ
Okay. English is a basic course in Japan, but almost none of it is retained. Similar to high school Spanish classes. I'm pretty sure 5 years out of high school nobody remembers any Spanish.
Basically what younger Japanese kids do today is the same thing weeaboos do; they sprinkle the words in their speech, nothing more. And know how many weeaboos can adequately speak Japanese? pffffffff. Just because they say サンキュー doesn't mean they will be speaking English anytime soon. In fact, they're afraid to.